Transformer of electricity.



J. W. DAVIS. TRANSFORMER OF ELECTRICITY.

APPLIGATION FILED MAY 8, 1911.

1 ,056,739, Patented Mar; 18, 1913.

JOHN W. DAVIS OF ST. CLAIR, MISSOURI, ASSIGNOR BRIEGLEB, OF ST. CLAIR, MISSOURI.

OF ONE-FOURTH T0 CHARLES r,

TRANSFORMER. 0F ELECTRICITY.

To all whom it may concern:

' Be it known that I. Jonn \V. DAVIS, a citizen of the United States, and a resident of St. Clair, State of Missouri, have invented a certain newand useful Improvement in Transformers of Electricity, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming a part hereof.

lVy invention relates to an improvement in commutators, and consists of the novel arrangement and construction of parts as set forth in this specification and in the claims.

The object of my invention is to construct a device which may be used either to change a direct: to an alternating current, or an y 3. is another vorming part of ng a modified form of in alternating to a direct current.

My improved commutator is more simple in its construction, less expensive and far more durable than any form of commutators now in use.

Referring to the drawings: lfigurel. is a plan view of the commutator of my invention, showing its mountings, contacts and motor. Fig. 2. is an elevation of the commutator forming part of my invention. Fig. elevation of the con'imutator my invention. Fig. 4. is an end elevation of the commutator showy invention with the roller brushes in "contact.

1 represents a base, having a frame 2 and a motor 3 mounted thereon. Mounted for rotation in suitable bearings 4.4 on the frame 2 is the shaft 5 Mounted upon the shaft 5 and insulated therefrom and from each other are a plurality of segments (3-6 and 7' 7. Rigidly mounted upon the upper part of the frame 2, insulated therefrom and positioned to contact with the segments 66 and 7-7 are the brushes 93-8". Mounted upon the lower side of said frame 2 on the side of the frame opposite to the brushes 8, insulated therefrom and positioned to contact with segments 66 and 7 7. are the brushes 9'9 The current is carried into my commutator by the wires 1010 which are held in position against the brushes 8-8 by the binding screws 11-1l and the commutated current is carried from my device by the wires fil 10 which are held in position against the brushes S e-9" by the binding screws 11-11*. a

Specification of Letters Patent. Application filed May 8, 1911.

Patented Mar. 18, 1913. seriaino. 625,847.

the gear-wheel 12, which is positioned 13 upon the motor shaft 14.

siderable modification to mesh with the fixedly mounted gear wheel In a modified formof my construction the brushes 8 -8 9" have a roller 15 mounted for rotation upon their free end and positioned to contact with the segment 'lheri operation of my device is as follows: W hen it is desired to change a direct to an alternating current the current is carried into my device by means of the wires 1010 and motion imparted to the shaft 5 by mans of the gear-wheels 12 and 13 and the motor 3. The segments 66 are so constructed in form and so positioned on the shaft 5 that when the brushes 88 are in contact therewith the current passes directly through said segments to the companion brushes 99"; while the segments T-7 are-so constructed in form and so positioned on the shaft 5 that when the brushes R-8" are in contact therewith the current passes through said segments from the brush 8" to the brush 9" and from the brush 8 to the brush 9. The revolution of the shaft 5 causes the segments to revolve and the segments 6'6 and 7-7 are successively brought into contact with the brushes 88" and 9"9 and the current passes from my device through the brushes 99 and the wires 10-10 has an alternating current. the frequency of alternation being controlled by the frequency of revolution of the shaft- 5 and the speed of the shaft is regulated by any suitable gearing or by a rheostat attached to the motor. If the an alternating to a direct our cut the alternating current is carried into my device through the wires 10-1'0 and the operation of my commutator is the same as above de-. scribed for commutatmg the direct current.

Obviously, the mechanism admits of conwithout departing from this invention, and therefore I do not wish to be limited to the specific construction and arrangement shown.

l-Iaving thus described my invention I claim:

shaft, two segments mounted on said shaft, and insulated therefrom other, each of said so exits consisting central member eaten mg circumferenti'ally Rigidly mounted on one end of the shaft.5

change is to be made fron and y from each of a . '105 .1. In a device of the class described; a'

of the shaft and oppositely central member extending circumferentially.

of' the shaft and oppositely rotating said shaft.

shaft,.two segmentsfmounted onpsaid shaft,

- and insulated therefrom and and insulated therefrom and from each other, each of said segments consisting of a central member extending of the shaft and oppositely disposed end members extending axially of the shaft, the respective members ofeach segment being in alinement with corresponding members on the other segment, two-brushes positioned to contact with. said segmentsand to carry an'ele'ctric' current into said segments and the commutated-clirrentaway from same, and means for rotating said shaft.

In testimony whereof I have signed I disposed end members extending axially of the shaft, the respective mem ers of each segment being in alinement with corresponding members on the other segment, and means for-rotating said shaft. v

2. In a device of the class described, a shaft. two segments mounted on saidshaft from each saidsegments consisting of a other, each of disposed end members extending amally of the shaft, the respective members of each segmentbeing in alinement with corresponding members on the other segm nt, two brlishes positionedto contact-with said segment and means for g T Witnesses;

' NVN, MITCHELL,

TnomsP. TIVY.

two subscribing witnesses. JOHN w. DAVIS.

3. In a device of'the class described.,.-a

Copies ot this patent may belobtained to: five cents ea'oh by addxesvsing the Commissioner of fratenh,

name-to this specification in the presence of circumferent-ially 

